books.google.com.au - With more than 700,000 copies sold to date, Java in a Nutshell from O'Reilly is clearly the favorite resource amongst the legion of developers and programmers using Java technology. And now, with the release of the 5.0 version of Java, O'Reilly has given the book that defined the "in a Nutshell" category...https://books.google.com.au/books/about/Java_in_a_Nutshell.html?id=mvzgNSmHEUAC&q=JAR+file&utm_source=gb-gplus-shareJava in a Nutshell